The Pearl Outlet.com noticed that more people were buying pearls to apologize. (Male people, mostly likely, Mrs. G. notes.) So they commissioned Zogby International to conduct a poll, asking people if they would apologize in three different cases: when they were to blame, when they were partly to blame, and when they were not to blame. In each case, married people were twice as likely to apologize to their spouses than unmarrieds were to their girl- and boyfriends.
Even more interesting, your likelihood of apologizing directly correlates with how much you make. Among people who made more than $100,000 per year, 92% said they would apologize if they were in the wrong, versus only 52% of those earning under $25,000, with proportionate results for the paygrades in between. When those same people thought they were blameless, the high earners would still apologize 22% of the time, versus 13% of the lowest earners.
The report of the poll leaves many blanks - especially whether there are sex differences in apologizing, and whether there is a difference between apologizing to your spouse and apologizing in a business or social situation. Still, a fascinating, and unusually strong correlation.